Question

The area of a circle is 12.56 square kilometers. What is the circle's radius?

Answer 1

`r = 2km`

Explanation:

Area =

`area = \pi {r}^(2)`

`12.56 = 3.14 * {r}^(2)`

`{r}^(2) = (12.56)/(3.14)`

`{r}^(2) = 4`

`r = √(4)`

`r = 2km`